JUMP TODeveloper DashboardMy RequestsMerchant APICheckoutsRetrieve a checkout sessiongetUpdate a checkout sessionputCreate a checkout sessionpostList all checkout sessionsgetCancel a checkout sessionpostCustomersRetrieve a customergetUpdate a CustomerpatchDelete a CustomerdeleteList customersgetCreate a CustomerpostExchange RateGet latest exchange ratesgetGet historical exchange ratesgetGroup PaymentsComplete a group paymentpostList all group paymentsgetCreate a group paymentpostRetrieve a group paymentgetUpdate a group paymentpatchCalculate group sharepostRefund a group paymentpostList all group payment refundsgetItemsRetrieve an itemgetUpdate an itemputCreate an itempostList all itemsgetMerchant WebhooksAdd a webhook endpointpostList all webhook endpointsgetUpdate a webhook endpointpatchRemove a webhook endpointdeleteRetrieve a webhook endpointgetMulti-Card PaymentsComplete a multi-card paymentpostList all multi-card paymentsgetCreate a multi-card paymentpostRetrieve a multi-card paymentgetUpdate a multi-card paymentpatchRefund a multi-card paymentpostList all multi-card refundsgetCancel a multi-card paymentpostPaymentsList all paymentsgetCreate a paymentpostRetrieve a paymentgetCancel a paymentpostComplete a paymentpostRefund a paymentpostList all payment refundsgetRefundsList all refundsgetRetrieve a refundgetRefund a multi-card paymentpost https://sandbox.handsin.co.uk/v1/multi-card-payments/{multiCardId}/refundsCreate a full or partial refund on a multi-card payment